Telephone muffler



March 12,' 1929. M. MEYERSN TELErHoNE NUFFLER Filed July 24, 1925 lNvaNoR A.; ATroRNl-:Y

Patented Mar. 12, 1929.

UNITED STATES MAX MEYERSON, OF NEW YORK, N. Y.

TELEPHONE MUFFLER.

Application led July 24, 1925.

This invention relates to a sound proof mouth piece for telephones and an object of the invention is to provide a simple, cheap and eliicient mouth piece which will not only be ot attractive and ornamentalv appearance but which may be quickly and easily attached inoperative position over the transmitter casing and mouth. piece oit a standard telephone set.

A further object is to so construct the device that it will provide, by the inherent resiliency and flexibility of its main body portion, a suitable gripping action against the transmitter casing so as to retain itscltI lirmly in attached operative position.

A further object is to so shape the device that when in operative position it will provide a portion oit suitable contour to closely lit about a speakers mouth without inter- 'lferring with ordinary lip movements, and will also provide a sound box portion of appropriate shape to etiiciently receive and convey sounds trom the mouthvolf the speaker into the n'iouth piece oit the transmitter.

A further object is to provide an etlicient form oi dellector element arranged within the present mouth piece of a character to modulate Ahe sounds passing trom the mouth of a speaker toward the standard mouth piece and to so deflect and direct the sound waves n as to cause the same to reach the standard Cil mouth piece with a minimum of distortion.

A :tui-ther object is to provide a portion to rest against the speaker-s face, and to construct this portion so that it will be capable oi? a suitable easy movement relative to the main body portion and thus not interifere with the movements ot the speaker-s features during conversation.

Other objects and aims of the invention, more or less specific than those referred to above, will be in part obvious and in part pointed out in the course of the following description of the elements, combinations, arrangements oit parts and applications of principles constituting the invention, and the scope of protection contemplated will be indicated in the appended claims.

In the accompanying drawings which are to be taken as a part of this speciiication, and in which I have shown merely a preferred form of embodiment of the invention Fig. l is a vertical longitudinal central sectional view through a mouth piece constructed in accordance with this invention, and

Serial No. 45,776.

Fig. 2 is a simil ar sectional view taken at right angles to the view o'f Fig. i, namely upon the plane of line Il-ll oit Fig. l. Referring to the drawings for describing in detail the structure therein shown the reterence character L indicates, by dotted lines, trie transmitter easing et a standard telephone transmitter set, the saine includingthe usual standard month piece G projo ting Ylorwardly tron. the flat jface of the casing L.

The mouth piece comprising the present invention consists ot a main body portion H within which is arranged a sound de'lector or parY tion member l. The body portion. is ot tubular form and the deiiector l is arranged interiorly thereof, being supported .ipon a vertical cross rod 2 which extends between the upper and lower walls 3 and loi the body and has its opposite ends connected with said walls and retained in position by suitable heads or other retaining means thereon as The rear end portion as 6 ot the tubular body in use is circular and is oit a size to lit snugly over the outer-most circumferential portion ol the transn'iitter casing L.

The `forward end portion as 7 of the tubular body in use ot a general oval contour, being relatively wide in a horizontal plane and relatively narrow in a vertical plane. This forward end portion is suitably curved to con'orm to the features of a speaker and is provided with a cushion element 8 extending entirely around the edge portion so that the surface oi said cushion element only will come into contact with the tace of a speaker surrounding the speakers mouth and entirely tree from the speakers nose.

The cushion S may he formed ot any suitable inaterial, as for instance a sott 'felt or velvetlike material and it is preferably connected with the adjacent edge portion of the body YH, by a relatively tain neck like portion 9 so that that portion ot the cushion which rests against the speakcrs 'tace in use will be capable ot a considerable amount oi? easy movement relative to the body H and so that th portion oit the cushion 8 wh ich is in engagement with the speakers face will be capable ol' moving in connnon with the speaker` tentures and thus not interfere with the easy pronunciation of sounds by the speaker, while at the same time ciliectually closing the joint between the mouth piece and the speakers 'face so that ne sound can pass outwardly through said joint.

(lli

The body portion H may be made of any suitable material but preterably consists et an appropriately shaped sheet or pieee ot lightltiber-board or other lilre sound deadenieg material as l0, the inner surface being preferably covered with a layer as ll of soit felt or other appropriate finishing` and sound insulating material.

The lu material Vll vijir'eferably extends throughout the length of the body H so that a portion thereoix stands in position between they liber-board l() and the suri'aee of the transnutter easing L and thus provides a drm an d sound proof joint between the liber-board e i l 1 sinitter easing.

rivard end oi: the body the lining' ll preierably extends ov r the portion l2 or" the cushion element 8 and thus Compl an attractive and eliieient joint ot the e elementivith the body.

The sound detleotor l eonsists preierably of a single piece of liber-board or other nonresonant material bent into ll shape and arranged so that the Connecting portion as i3 of the U stands in iront of the standard mouth piece G While the opposite legs as lll and l5 ont the U stand in position straddling the mouth pieee G. The portion is formed with a bearing' opening 16 therethrough by which it is connected with the rod 2, the b ing lo being 'termed by providin tivo horizontal slits as l? and i8 i n( the material et the detleetor and oi spreading the mL lial a lfaeett slits so that the portions between the slits stands at one side of the rod While the portions below and above the slits stand at the opposite side ot the rod, as clearly illustrated in the drawings.

It is noted that in use the horizontal Width ot the present mouth piece at the lorivard end 7 relatively greater than at the rear end fitting over the transmitter easing', Whereas the vertical Width at the forward end is relatively less than at the rear end litting over the transmitter easing. In this Way there is provided a. proper Width and contour at the forward end for fitting' to the speakers teatures and a sound box portion i9 rearwardly of the rod 2 increasing in vertieal Width rearwardly et said rod and decreasing in iorizontal Width rearwardly et said rod.

rlhe piece oit material from which the sound detleetor l is formed is preferably unitormly rectangular throughout so that 'the relation of the legs i4 and l5 thereof to the peculiarly Changing contour oi the rearward portion of the body H provides triangular openings as 2O and 2l above and belenY said legs through which the sound Waves iroro the spealrers mouth traverse on their way to the standard mouth piece (at, these openings lieing oit progressively increasing size rearwardly so that the main 'volume ot sound Will pass through them in regions Closely adj aeent to the forward face of the transmitter easing sion ot such Waves as is usually telephone mouth p ieee struetires providing a substantially sealed sound Chamber between the speaker-s mouth and the transmitter mouth piece lt appears probable that the small amount oi' sound passing directly through the openings and are so influenced by the sounds ivhieh traverse the relatii lv tortuous paths through the openings id 2l as to enable the former to elileet i transmission through the telephone det, i ntal aetion oi the latter.

lt is noted further that the manufacture olf this improved mouth piece the body H is originally substantially a perfectly cylindrical element. ln attaching the rod 5 the Cylindrical Contour is changed to an oval Contour which is substantially uniform throughout the length of the body, and it is in this Condition that the device is marketed and reaches the user. ln attaching the device onto his transmitter easing the user tienes the rearward portion of the body, by pressure against its parts ot greatest Width,

so as to malte the rear end portion suitablyv circular to admit oi its passage over and onto the circular surtaee or the transmi easing L. Thereafter theinherent tendeney of the material of the rearward portion of the body to return to its normal oval contour produces resilient pressure against the upper and lower portions of the transmitter easing L which. eauses the edge portion Tof the transmitter easing to become embedded in the lining material l1 so as thus to iirmly retain the improved mouth pieee in operative position upon the transmitter easing, it being understood of course that the material of which the body H is formed is suitably ilexible and resilient to alord the effects described.

As many ehanges could be made in this construction Without departing from the scope of the invention as defined in the fol-v lowing claims, it is intended that all matter Contained in the above description or shown in the accompanying drawings, shall be interpreted as illustrative only and not in ay limiting sense.

For instance it is intended that the body that by pro-V H may be made to be permanently of the shape as illustrated in the drawings in Which case no flexing of the material of the body Will be utilized 'for retaining it connected with the transmitter' casing'. The closeness of .tit of the rear end portion upon the annular surface ot the transmitter casing will suilice in this event.

Having` thus described my invent-ion, what I claim as new and desire to secure by Letters Patent is l. A muliler intended for attachment to a standard telephone transmitter casingl oi circular exterior contour7 said mull'ler comprising a tubular vlleXible resilient mend er normally o't oval contour, and being adapted to be sprung from oval to circular cross section at one point to thereby receiv the trans initter easing and provide a friction grip lor itselt upon said transmitter casing.

2. A mufller intended ifor attachment to a standard. telephone transmitter casingv ot circular exterior contour. said muiller comprising a tubular flexible resilientmember normally ot oval contour7 one end et said tnlnilar member being` curved to conform 'to the facial contour ot' a speaker and said `l nl; r niber being' adapted to be sprung so opposite end will receive the transmitter casing and closely hug the circular sui-'tz :e et said transmitter casing and. thereby itrictionally retain the muffler connected with the transmitter casino'.

3. A mulller intended for attachment to af standard telephone transmitter easing, said mullier comprising a tubular flexible resilient member normally ot oval contour, a rod er;- tending` transversely oit said tubular meinber across the vertical diameter thereo't and having heads to retain the Walls ot' the tubular member from spreading apart adjacent said rod, the end portion of the tubular member at one side et said rod being` intended to receive sound from a speakers mouth, and the opposite end of said tubular member at the other side of said rod being adapted to be 'flexed and engaged over the telephone transmitter casing to thereby rictionally retain the mulller connected with the transmitter casi: g

l. A muliler for a standard telephone transmitter, said muliler comprising a tubular body member oval at one end and circular the other end, the first end being intended to receive sound lrom the speakers mouth and the second end being adapted to ,tit over and engage upon the telephone transmitter casing, Ytogether with a sound de'tlector a r ranged within said inutile-r intermediate the ends thereol said sound dei'lector being of U shape and being arranged with the connecting portion ot'the U -facingthe lirst mentioned end and with the opposite legs o't the U extending; toward the second mentioned end in position to straddle the standard month piece oil the transmitter.

5. A mulller intended for attaclm'ientto a standard. telephone transmitter easingof circular exterior contour, aid muliler comgrising a tubular flexible resilient member, means extending` diametrically between opposite wall parts ot said member holding;I said member in normal oval contour, one end portion o' said member being however adapted by its tlexible and resilient character to be sprungl Ytroni oval to circular cross section to thereby receive the transmitter casing' and provide a friction grip 'for itself upon .said transmitter casing7 a detleetor arranged Within said inuller, and said de'tlector and the mentioned means tor holding the mnliler in normal oval contour having parts co-operative to support the deflector.

In, testimony Whereolf I altix my signature.

MAX MEYER-SON. 

